I build data and AI systems. Right now I'm Data Architect at First 5 Alameda County. Before that, four years at TalkingPoints (2022–2026), building their data infrastructure, analytics, and AI. On the side: Relod and Spanish-language data writing at tacosdedatos.
This week: This site's status used to come from a cron job. Now it comes from Nahual and Garita, where I keep project memory and watch what my repos are doing. Next I am wiring the two together so what you read here tracks what I am actually working on, not a snapshot I forgot to update.
Senior Data Engineer at an EdTech platform that connected millions of multilingual families with schools.
I worked at TalkingPoints from 2022–2026. Each project lists its own dates, so some begin later within that span.
2022–2026
70% cost reduction, near-real-time data freshness
read more →2022–2026
5+ enterprise partners, 50%+ reduction in ad-hoc requests
read more →2022–2026
360-degree customer views, 4 system integrations
read more →2024–2026
New product vertical enabled, BTS-ready performance
read more →2025–2026
Evidence-based product development, impact measurement
read more →2024–2026
AI quality assurance, cost controls, evaluation frameworks
read more →ESP32 sensors + consumption forecasting for food businesses. Know when to reorder before you run out. Currently piloting with San Francisco/Berkeley cafés and bars. The physics are simple (distance sensors); the behavioral patterns are not. Accepted to Founders Inc.
Spanish-language newsletter and community focused on AI and data. 20K+ followers, 1100+ active members. Weekly posts on AI Ops, practical implementations, and emerging tools for the Latin American tech community. Building accessible technical content where language isn't a barrier.
A frictionless journaling system for capturing insights. Kishmish: headless Raspberry Pi running on-device AI for voice transcription, entity extraction, and intent analysis. No screen to distract, works offline-first. Amoxcalli: companion app that highlights patterns and connections across entries. Currently testing v0.4 hardware with PiSugar battery.
AI-powered lesson design workbench where educators assemble lesson blocks with persona vibes, tone/time/materials tags, and post-lesson reflections. Draggable flow interface with suggestion column and component remix capabilities.
Agentic career development system that lives in your terminal. Tracks progress through git commits, provides daily check-ins, and delivers personalized coaching both locally and via ChatGPT integration. Command-line tool for continuous professional growth tracking.
I build data systems, agent workflows, and public tools. As Data Architect at First 5 Alameda County, I'm working on data infrastructure for early childhood education programs. Previously at TalkingPoints, I built infrastructure that processed billions of messages between families and schools. On the side: Relod, Tacos de Datos, and the Nahual/Garita setup I use to keep track of the work.
I write about data engineering and AI operations in Spanish through tacosdedatos (~1,800 subscribers), and I'm writing guides on data storytelling and building AI collaborators. I also coach and tutor on using AI tools like Claude Code for data analysis. I build AI tools that leave the final call with the person using them.
I want people to be able to do more on their own. That usually looks like helping educators reach families who don't read English, giving a small business a system that runs without me, or explaining something technical in Spanish so it isn't locked behind the language. I ship small things that solve one problem, and I watch what they cost—not just to build, but to keep running—because a solution you can't afford isn't one. If that's the kind of work you care about, we'll get along.
Optimistic realism—progress in small slices
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Automatic with override
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Personalized with consent > generic for everyone
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Tools augment, not replace
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Sustainability matters
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Empowering over restricting
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Access means everyone.
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Diagnose with data, treat with design
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Great design is felt
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Open to consulting, coaching on AI tools for data work, speaking (EN/ES), and conversations about what's next.
Or reach out directly: sergio@cimarron.io